This is definitely bad!Tidus when entering battle against Omega Weapon
Omega Weapon is an optional boss in Final Fantasy X. It is the fearsome fiend transformed from Omega through his anger that was so great, it also spawned the lesser Ultima Weapon. The words "Omega Weapon" are inscribed on Omega Weapon's tail in Spiran script.
In the original North American and Japanese versions, Omega Weapon has mere 99,999 HP, not much of a greater challenge over Ultima Weapon. It was upgraded for the International, PAL, and HD Remaster versions, now boasting 999,999 HP; it could thus be considered a superboss.
The theme for the battle is called "Challenge".
Omega Weapon's attack pattern cycles between four stages; each stage allows it to use its normal physical attack or certain abilities, with the latter advancing it to the next stage. Its normal physical attack will deal around 4,000 HP damage, while Core Energy functions the same as Ultima Weapon's and will cause between 4,500 and 9,999 HP damage to one character. After using Core Energy, it has a chance to use Confuse or Break. This leads to Shimmering Rain, which also returns, hitting the whole party for around 2,500 damage. The final stage lets it use Demi or Ultima. Its ultimate attack is Nova, which can deal over 7,000 damage to all. It will use this after its counter reaches 30, which increases by 2 when using an ability and 5 when using a physical attack.
In the NTSC version, Omega Weapon will not put up much of a fight. The player's goal is to deal as much damage as possible in a short time, which is made possible by the use of Celestial Weapons, Break Damage Limit, Overdrives, aeons, and Trio of 9999 (though none of these are required to defeat the Omega Weapon). It's likely the Omega Weapon will be defeated before it uses Nova.
In the International, PAL and HD Remaster versions, Omega Weapon's additional HP and elemental absorbency make it harder to defeat, and Tidus's Brotherhood shouldn't be used because it is Water-elemental. Mighty Guard, either from Kimahri or Rikku, is a major help, as one only has so many items and so much MP, and they may not last long enough to deal with Omega Weapon's nearly one million HP. On the other hand, Osmose now works against Omega Weapon.
Omega (capital: Ω, lowercase: ω; Greek Ωμέγα) is the twenty-fourth and last letter of the Greek alphabet. It is synonymous with a set's end or limit.
- Ultima Weapon